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Stainless Power 1-7/8-Inch Long Tube Headers; Catted (15-23 Mustang GT w/ SW Cat-Back)

Item 390795-A
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Market Price $1,320.83 You Save 13% ($172.28)
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Ship to: Ashburn - 20149
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Increases Horsepower and Torque
      • Long Tube Header Design
      • High-Flow Catalytic Converters Included
      • 1-7/8" Primary Tubes with 3" Collector
      • Free Flowing Mandrel-Bent Tubing
      • 304 Stainless Steel Construction - Natural Finish
      • Intended for Off-Road, Track Use Only
      • Requires Stainless Works 3" Cat-Back Exhaust Part# 384843
      • 24-Month Guarantee on Material and Workmanship
      • Designed by Stainless Works
      • Fits Left Hand Drive Models Only
      • Fits 2015-2023 GT Mustangs with Stainless Works 3" Cat-Back


      More Horsepower and Torque. Are you on the a quest of more power to defeat your rivals whether you find them on the street, strip or at the track? If so, you should really lose those restrictive stock exhaust manifolds and replace them with a set of free flowing Stainless Power Long Tube Headers. Including a pair of high flow catalytic converters, these Stainless Power Headers feature venturi style merge spikes that optimize exhaust flow and improve scavenging. As a result, you will experience a dramatic increase in horse power and torque throughout the entire RPM range. Stainless Power's Long Tube Headers are the ideal choice for those Mustang owners that are looking for affordable high-end power.

      High Flow Catalytic Converters. Stainless Power's high flowing catalytic converters are engineered to outperform the restrictive stock cats. The included high flow catalytic converters provide a significant increase in exhaust flow for a measured improvement in horsepower and torque at the rear wheels.

      Superior Construction. Stainless Power Headers are manufactured to Stainless Works exact design specifications. Stainless Power Headers are CNC mandrel bent from 1-7/8" diameter, 304 stainless steel tubing for excellent exhaust flow and long lasting corrosion resistance. These Long Tube Headers feature TIG welded construction, as well as laser cut 3/8" header flanges for additional strength and leak-free performance.

      24-Month Guarantee. Stainless Power is Stainless Works value-line brand of exhaust products designed for the cost conscious consumer that wants a high-quality product at a reasonable price. Stainless Power is so confident in the quality of their Long Tube Headers that they are backed by a 24-Month guarantee on material and workmanship.

      Required Upgrade. To realize the full power potential that these Long Tube Catted Headers have to offer, AmericanMuscle recommends a Bama custom tune with a Mustang Handheld Tuner to reprogram the vehicles computer (ECU) for proper operation.

      Application. These Stainless Power Long Tube Catted Headers are specifically designed to fit the 2015 to 2023 GT Mustang equipped with the Coyote 5.0L DOHC V8 engine. Requires Stainless Works 3" cat-back exhaust system part# 384843 for proper installation.

      Technical Note. Not legal for use on pollution controlled motor vehicles; intended for off road use only.

      Please Note.These Headers are intended for left hand drive applications only.



      Stainless Power SM15H3CAT

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Driver Side Header
      • (1) Passenger Side Header
      • (1) Driver Side Connection Pipe
      • (1) Passenger Connection Pipe
      • (2) High-Flow Catalytic Converters
      • (4) Clamps
      • (2) O2 Extensions
      • Hardware

      Tech Specs

      Header Specifications
      Header Type:Long TubeType Mid Pipe Required:Requires Stainless Works cat-back exhaust part# 384843
      Material:Stainless SteelFinish:Natural
      Catalytic Converter:"Yes" - For off-road use onlyFitment:2015-2021 GT Mustangs

      Customer Reviews (36)

        Questions & Answers

        10 More Questions

        Will It Fit My Mustang

        • Bullitt - 19, 20
        • EcoBoost - 23
        • GT - 15, 16, 17, 18, 19, 20, 21, 22, 23
        • Mach 1 - 21, 22, 23

        These Headers are intended for left hand drive applications only. Requires Stainless Works cat-back exhaust system part# 384843 for proper installation.

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